TYPOLOGIE DES CRUES EN ZONE MONTAGNEUSE, OCEANIQUE ET SEMI ARIDE. LE CAS DU BASSIN VERSANT DU KSOB (HAUT ATLAS OCCIDENTAL, MAROC)
Journal Title: Larhyss Journal - Year 2012, Vol 11, Issue 11
Abstract
The watershed of Ksob to Adamna is a hydrosystem of western High Atlas of 1483 km² of surface. The main river which flows towards the Atlantic Ocean into the direction SE-NW is formed by the junction of two big tributaries of Zelten and Igrounzar. The pluviometric regime is characterized by a rainy season marked well from October to April. But the precipitations are, in general, conform , altogether, in the semi arid area by their annual heights which do not exceed on average 305 mm. The superficial flow is also rather low. it is in average of the order of 24 mm a year (1,13 m3/s). However the extreme flows are particularly raised and the floods of the river are rather violent. They are characterized by time of rises rather short and debits of very high points for a catchment of 1483 km² and a module of 1,2 m3/s. the Hydrograms of floods are often aigues testifying of the brevity and the power of the events. The floods of Ksob have also drew the attention by their high frequencies; the brutal pulsations of the stream arise almost every year by bringing their lots of solid load and infrastructure damage. This observation incited to define and to undertake adequat hydraulic scheme in downstream watershed to counter the consequences of floods on the environment in general.
Authors and Affiliations
BAIDDAH A. | Laboratoire de Géosciences et Environnement, Faculté des Sciences et Techniques, B.P 549, Marrakech, Maroc, SAIDI M. E. | Laboratoire de Géosciences et Environnement, Faculté des Sciences et Techniques, B.P 549, Marrakech, Maroc, DAOUDI L. | Laboratoire de Géosciences et Environnement, Faculté des Sciences et Techniques, B.P 549, Marrakech, Maroc, EL MIMOUNI A. | Laboratoire de Géosciences et Environnement, Faculté des Sciences et Techniques, B.P 549, Marrakech, Maroc, SMAIJ Z. | Laboratoire Géostructures, géomatériaux et ressources hydriques, Faculté des Sciences, Marrakech
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